Ashing should be avoided.避免采用灰化消解.Wet ashing and flame atomic absorption determination of Ca, Mg and Fe have been studied.本文研究了湿法灰化火焰原子吸收法测定多种加工食品中的钙 、 镁和铁.We have the capabilities of preparing samples from ashing to wet...
成群结队的人聚集在特拉法尔加广场周围。Crowds gathered in the vicinity of Trafalgar Square.在特拉法加广场有一尊纳尔逊的塑像.There is a statue of Nelson in Trafalgar Square.她朝特拉法格广场走去.She walked toward Trafalgar Square....